Shure Microphone SM31FH User Manual

Product Specifications  
SM31FH Fitness Headset Condenser Microphone  
Overview  
The new SM31FH adds hydrophobic materials to the industry-standard, road-tested Shure SM family in a rugged and durable cardioid condenser microphone.  
TA4F 4-pin connectors make it a viable replacement for any existing Shure wireless headset system, and is also available with BLX and GLX-D wireless system  
bundles. The moisture-repelling cartridge housing protects the microphone and ensures a long lifetime of use, all but eliminating the need to frequently replace  
typical headsets.  
Features  
• Wearable wireframe headset with secure, comfortable fit made for fitness and aerobics instructors  
• Integrated moisture-repelling hydrophobic fabric protects the microphone element from harmful corrosion for use in humid environments  
• Flexible gooseneck design provides discrete adjustment options to optimize placement for greatest isolation  
• Lightweight and low-profile form factors stave off fatigue during high-impact use  
• Compatible with Shure wireless bodypack systems for direct replacement of TA4F-connected microphones  
• Available with a wide variety of Shure wireless systems, renowned for their ease of use and reliable performance  
• Included windscreen tames plosive, breath and wind noise for clean and intelligble sound  
Tailored frequency response refined for crisp and clear vocal reproduction  
• Legendary Shure precision engineering for durability and performance  
SM31FH  
Available Models  
SM31FH-TQG  
BLX1288/SM31  
BLX14/SM31  
BLX188/SM31  
GLXD14/SM31  
Fitness Headset Cardioid Condenser Microphone with Windscreen  
BLX Dual-Channel Wireless Combo System  
BLX Wireless Headset System  
BLX Dual-Channel Wireless Headset System  
GLX-D Digital Wireless Headset System  
Specifications  
Type  
Electret Condenser  
45 to 20,000 Hz  
Unidirectional (Cardioid)  
600 Ω  
Frequency Response  
Polar Pattern  
Output Impedance  
@ 1 kHz  
Audio Output Level  
Signal-To-Noise Ratio[1]  
@ 1 kHz  
-50 dBV/Pa  
66 dB  
Maximum SPL[1]  
145.0 dB  
117.0 dB  
28 dB  
1000 Ω load, @ 3% THD  
Dynamic Range[1]  
@ 1 kHz, 1000 Ω load  
Equivalent Output Noise[1]  
Typical, A-Weighted  
Power Requirements  
Polarity  
+5 V DC (nominal), 10 V maximum (DC bias)  
Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1  
Cable  
1.1 m (45 in.)  
TA4F  
Connector  
Net Weight  
60 g (2.11 oz.)  
[1]Measurements taken using RK100PK preamp set @ 0 dB using 8k bias resistor.  
* All specifications measured with a 48 VDC phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.  
Optional Accessories  
RK379  
Replacement kit with clip + 2 foam windscreens  
Polar Patterns  
Frequency Response  
20  
15  
10  
5
0
-5  
-10  
-15  
-20  
-25  
-30  
20  
100  
1k  
10k  
20k  
Hz  
1,000 Hz  
5,000 Hz  
10,000 Hz  
125 Hz  
250 Hz  
500 Hz  
0.6 m (2 ft.) from sound source  
1 cm (0.4 in) from sound source  
©2013 Shure Incorporated  
 

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